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.(No Model.)

H K AUSTIN Exhaust Nozzle for Locomotives.

No. 240,071. Patented April 12,1881.

Vii/varia NJET ERS. FKOTO-LITNOGRAPHER, WASHINGTON. n c.

I s UNITED STATES PATENT OFFICE.

HENRY K. AUSTIN, OF READING, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND NATHAN BANOROFT, OF SAME PLACE.

EXHAUST-NOZZLE FOR LOCOMOTIVES.

SPECIFICATION forming part of Letters Patent No. 240,071, dated April 12, 1881.

Application filed January 29, 1881.

To all whom it may concern:

Be it known that I, HENRY K. AUSTIN, of Readin g, in the county of Middlesex and State of Massachusetts, have invented certain Improvements in Exhaust-Nozzles for Locomotives, of which the following is a specification.

This invention relates to that class of exhanst nozzles or tips for locomotives so constituted that the discharging area or outlet of the exhaust-pipe may be varied at the will of the engineer for the purpose of freeing his engine when desired, and is an improvement on the variable-exhaust patent of A. S. Smith, No. 125,414, issued April 9, 187 2.

The invention consists, first, ina nozzle or tip of peculiar and novel construction, whereby greater perfection of action is secured; and, secondly, in the provision of means for operating said tip from the cab of the locomotive,

all of which I will now proceed to specifically describe, reference being had to the accompanying drawings, forming part of this specification, in which- Figurel represents a vertical section of a nozzle or tip embodying myinvention. Fig. 2

represents a top view of same. Fig. 3 represents a side view of a portion of a locomotive, showing part of the mechanism employed in operating a nozzle embodying my invention.

Fig. 4 represents a top view of the same, showing also the additional mechanism required. Fig. 5 represents a front view of the mechanism shown in Fig. 4; and Fig. 6 represents a similar view, exhibiting a modification of my 3 5 invention. 7

In these several figures similar letters of reference refer to the same parts.

In the drawings, A represents a metallic nozzle or tip, tubular in form, and adapted to 0 be rigidly connected with the exhaust-pipe of a locomotive-engine. tip A is carried outwardly at a, thus enlarging the area of the tip and forming a chamber, 0 0, within the same. Above the chamber 0 c the 4 5 vertical wall of the tip is carried inwardly with an abrupt inclination to meet the top of the tip 0?. In the inclined portion of the ver- The vertical wall of the (No model.)

tical wall thus produced a series of ports or orifices, d, are formed entirely around the tip.

f represents a flange entirely surrounding the tip and rigidly secured to the same by bolts.

In the intervening annular space formed between the flange f and the upper part of the vertical wall of the tip I place a register, con- 5 sisting of a series of plates, 61, formed upon a flange, 6. These plates d correspondin num her and size to the ports d, and the register rests upon the outer surface of the inclined portion of the vertical wall of the tip, and is adapted to be partially rotated, so as to bring the plates d over the ports d, and thus close the latter. The registeris confined in position within the annular space surrounding the tip by means of a lip, i, formed on the flange e, 65

and entering a corresponding groove or depression in the inner side of the flange f, the flange f being adapted to be secured to the tip after the register has been placed in position. The register is rotated and the ports d opened or closed bymeans of an arm, h, formed upon the flange e or rigidly connected with the same and suitable operating mechanism communicating with the cab of the locomotive, and shown in Figs. 3, 4, 5, and 6. Said operating mechanism consists of a shaft, 8, extending horizontally through the side of the smoke-stack arch, a crank, p attached to the outer end of said shaft, a connecting-rod, 1"", connecting the crank p to the lift-arm of the locomotive, (said lift-arm being connected, as usual, to the reverse-lever l in the cab O by a rod, r,) and suitable intermediate mechanism connecting the shaft 8 with the arm h of an exhaust-nozzle in the smoke-arch, or with the arms of two nozzles when a double tip is used,

as shown in Fig. 4.

Two forms of intermediate mechanism are shown. In the construction shown in Fig. 4 the shaft .9 has a bevel-gear, g, meshing-with 0 a similar gear, g, upon the vertical shaft 8 within the smoke-chamber. An arm, n, upon the shaft 8 is connected by means of the link a with the rod m. The extremities of the rod at are connected with the arms h h of the nozzles or tips A A, placed in position over the exhaust-pipes of the locomotive. The gears gg are protected from dust, ciuders, 860., by a tight cast-iron casing, K. (Shown in Fig. 4.)

By means of the described mechanism the movement of the lever l is transmitted to the armshh and the register of the tips AApartially rotated, thus opening or closing the ports d in said tips. The aforesaid mechanism is so adjusted that when the lever Z is on the center, as shown in the figures, and the engine standing still, the ports 61 are closed. When the lever 1 is moved forward or backward the ports are opened.

The described connection of the exhaustnozzles with the reverse-lever prevents the engineer from neglecting to operate the register and vary the discharge-openin g of the nozzles. If desired, however, the rod r may be disconnected from the lift-arm, and the exhaust may be opened or closed by means of the rod 1, one extremity of whichis attached to the crank p and the intermediate mechanism connected with the arms h h of the nozzle-register, and the other extremity attached to the lever h, secured to the inner wall of the cab by means of the link 1 The lever h is provided with a self-shootin g bolt adapted to engage with notches in an arm, 1", attached to the wall of the cab, thus locking the lever and the registers of the exhausttips in any desired position.

In the modification of my invention shown in Fig. 6 I substitute for the cogs g g and other intermediate mechanism connecting the pivoted crank 19 with the register-arms h the vertical rotary shaft 0, having thereon an arm, or, connected with the crank 11 by a link, x, pivoted to the shaft 8, and also having an arm, wipivoted to the link at, which is connected with the arm h of the nozzle-register. The movement of the crank 19 partially rotates the shaft 0, and the arm 00 thereon acts to open or close the register by means of the link a, connected therewith.

The operation of my invention will be readily understood from the foregoing description.

When the locomotive is at rest the ports 61 are closed, the lever I being then on center, as above stated. When the locomotive is started and the lever 6 moved forward, the ports 61 are opened, thus enlarging the discharging area of the exhaust-pipe and giving a freer outlet of steam at the time when such outlet is most required. The same result is effected by moving the lever Z back when the movement of the engine is reversed.

My improved form ofnozzle herein described presents several important advantages over corresponding narrow register seat. This therefore reduces to the minimum the rubbing-surfaces, overcoming friction and liability to corrosion. The abrupt inclination of the upper part of the wall of the nozzle-approximately horizontal allows the ports to be made large, and affords a direct upward outlet for the escaping steam passing through the nozzle from the exhaust-pipes, while at the same time the nozzle can be made as short as desired. The vertical flange e of the register and the vertical flange f outside it cause any steam that may escape between the register and the flange f to issue upwardly, preventing all lateral leakage of escaping steam, such lateral leakage sometimes occurring in the ordinary form of nozzle, being liable to deaden the draft in the smoke-arch, besides creating moisture which mixes with the cinder and produces incrustations and rust upon the surfaces of the smoke-arch.

When a single nozzle or tip of the ordinary form is used upon the exhaust-pipes, there is a liability of the exhaust-steam from one cylinder entering the other cylinder and creating back-pressure when the ports are closed. This is obviated in my invention by the formation of the chamber 0 0 within the nozzle, thereby affording more space for the escaping steam and preventing back-pressure.

Having thus described my invention, I claim 1. The tip A, having its upper portion inclined inwardly to form an approximately horizontal seat, containing the ports d, and provided with the vertical fixed flange f outside of said seat, combined with the movable register d, resting upon said seat and provided with the vertical flange 0. bearing against the inner vertical surface of the fixed flange f, substantially as shown and described.

2. The improved variable-exhaust nozzle, composed of the tip A, having the central steam-inlet, c, at its base, the approximately horizontal seat provided with ports 01 and main outlet a at its top, the intermediate enlargement or chamber, 0, the vertical flangef, and the movable register on said seat, all constructed and operated substantially as described.

3. A nozzle for locomotive exhaust-pipes having a chamber formed within-the same by enlargement of the tube, and having approximately horizontal ports over said chamber, said ports being adapted to be opened or closed by a register rotating within an annular space around the top of the nozzle, as set forth.

4;. The herein-described means for operating a nozzle for exhaust-pipes, consisting of the connecting-rod 1*, connected with the lift-arm p, rod 1, and reverse-lever l, and with the arm h of the nozzle-register, by suitable intermediate mechanism, the whole acting to open and. close the ports of the nozzle, as set forth.

5. The described means for operating a nozzle for exhaust-pipes, consisting of the rod T 'In testimony whereof I have signed my name connected with the nozzle-register by means to this specification, in the presence of two subof the arm h, the crank p and suitable inscribing witnesses, this 22d day of January, termediate mechanism, the other extremity A. D. 1881. 5 of said rod 7' being connected with a lever,

h, pivoted tothe wall of the cab by means HENRY AUSTIN of the link I, and provided with locking lnech- Witnesses:

anism, whereby the exhaust register or reg- NATHAN BANCROFT,

isters are locked in any desired position, as set MARIA J. AUSTIN.

IO forth. 

